129121905 is an odd 9-digits composite number following 129121904
and preceding 129121906 . In scientific notation, it is written as 1.29121905 × 10^8.
The sum of its digits is 30. It has a total of 4 prime factors and 16 positive divisors.
There are 61145280 positive integers (up to 129121905) that are relatively prime to 129121905.
129121905 has 16 divisors, whose sum is 207043200
The reverse of 129121905 is 509121921
Previous prime number is 473
Is Prime? no
Number parity odd
Number length 9
Sum of Digits 30
Digital Root 3
Name
one hundred twenty-nine million one hundred twenty-one thousand nine hundred five
Scientific notation
1.29121905 × 10^8
Engineering notation
1.29121905 × 10^6
Prime Factorization
3 × 5 × 473 × 18199
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
129121905
Product of the distinct prime numbers
The prime factorization of 129121905 is 3 × 5 × 473 × 18199.
Since it has a total of 4 prime factors.
4 , 5 , 3 , 70 , 758 , 158 , 3451 , 7220 , 20920 , 40666 , 886301 , 738639 , 549725 , 1170073 , 99777017 , 83782597 , 190049289 , 7828760 , 2447490162 , 7600262198
n×2
258243810
n×3
387365715
n×4
516487620
n×5
645609525
n÷2
64560952.5
n÷3
43040635
n÷3
32280476.25
n÷5
25824381
n2
16672466350829025
n3
2.1527806162674E+24
n4
2.7797113421953E+32
n5
3.5892162385436E+40
2 √n
11363.181992734
3 √n
505.43654700294
4 √n
106.59822696806
5 √n
41.898645658474
1 , 3 , 5 , 15 , 473 , 1419 , 2365 , 7095 , 18199 , 54597 , 90995 , 272985 , 8608127 , 25824381 , 43040635 , 129121905
16 divisors
τ
Total Divisors
16
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-129121904
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.0625
Returns the sum of divisors (σ(n )) divided by the total number of divisors (τ(n ))
G
Geometric Mean
1
Returns the nth root of the product of n divisors
H
Harmonic Mean
16
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 129121905 can be divided by 16 positive divisors.
The sum of these divisors (counting 129121905) is 1, the average is 0.0625.
Base
System
Value
2
Binary
111101100100011111001110001
3
Ternary
22222222001221210
4
Quaternary
13230203321301
5
Quinary
231023400110
6
Senary
20451310333
8
Octal
754437161
10
Decimal
129121905
12
Duodecimal
372ab3a9
16
Hexadecimal
7b23e71
20
Vigesimal
20704f5
36
Base36
24vj3l
md5
0d098357b6b3a65989fd168b043ba76e
sha1
c597c1c6ff1ebd8a6d20a5058bd86dcb3b7c9594
sha256
2f8178629976d780742caafdc7674df23d456177afa5edc7ee346ff8a2f91c53
sha512
749a4d84db9744b57dba0f924ba41bc50f3c416b00348d355451c8949256c9dbba29834ea5b589556fb08d6433b6b47224573e7db45675ee0c9aad588cb32752
ripemd-160
01d9e067b7289c1d2462d7e705ca73fd29f2e451
Diameter
258243810
Circumference
811296856.33104
Area
5.2378097804987E+16
Volume
9.0175463584751E+24
Surface area
2.0951239121995E+17
Circumference
811296856.33104
Perimeter
516487620
Area
16672466350829025
Diagonal
182605949.25045
Surface area
100034798104974150
Volume
2.1527806162674E+24
Space diagonal
223645699.83008
Perimeter
387365715
Area
7.2193897017796E+15
Altitude
111822849.91504
Surface area
7.2193897017796E+15
Volume
2.5370762869494E+23
Height
60868649.75015